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Finding the Fourth Proportional to 631,031.80, 870,721.08 and 372,872.80

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Solution

The fourth proportional to 631,031.80, 870,721.08 and 372,872.80 is: 514,503.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,031.80 : 870,721.08 = 372,872.80 : x
  2. Step 2: Convert to fraction form
    631,031.80/870,721.08 = 372,872.80/x
  3. Step 3: Cross multiply
    631,031.80x = 870,721.08 × 372,872.80
  4. Step 4: Simplify right side
    631,031.80x = 324,668,207,118.62
  5. Step 5: Solve for x
    x = 324,668,207,118.62/631,031.80
  6. Step 6: Final answer
    x = 514,503.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.